The best part is definitely when one of the rocks throws a pinecone at another rock, and it (on their time scale) immediately sprouts into a tree that knocks him over. I'm still giggling about that, several hours later.

Terrific visualization, very enjoyable. Alan Moore did a very similar concept (two massive rocklike alien beings with hugely different perceptions of time) in a short story called "Brief Lives", reprinted in the collection DC Universe: The Tales Of Alan Moore.

I wonder if that's where they got the idea, although this movie is more fully realized and prettier. I do recommend checking it out though if you enjoyed this movie and like comics.